init

.gitignore

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+target/
+.DS_Store

notes/glossary.md

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+# Glossary
+
+| term | explanation |
+| ---- | ----------- |
+| ahead-of-time compilation | compiling beforehand |
+| binary executable | a file that a computer already understands |
+| cargo | Rust’s official build system and package manager |
+| crate | a bundle of code that you can use in your project |
+| crates.io | the official Rust package registry |
+| drop | automatically freeing memory for a variable or other resource |
+| macro | it’s like a global function |
+| rustacean | a Rust community member |
+| rustup | the official Rust version manager |
+| turbofish | `::<T>` lets you explicitly specify the type |
+| wasm | Web Assembly |

notes/install.md

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+# Install Rust
+
+## Installing manually
+
+* I recommend you to use `rustup` (instructions below).
+* If you want to do it the hard way—manually—see [this](https://www.rust-lang.org/tools/install/)
+
+
+## rustup
+* Use this one to install any Rust version.
+  `curl https://sh.rustup.rs -sSf | sh`
+
+* You can even uninstall Rust:
+  `rustup self uninstall`
+
+* Let's see the Rust documentation offline:
+  `rustup doc`
+
+* You can update to a newer Rust version (*if you'd like*):
+  `rustup update`
+
+
+## Solutions to possible problems
+
+### VSCode integration problems
+* **If you see these errors:**
+  * Couldn't start client Rust Language Server.
+  * Rustup not available.
+* **Add this to your config:**
+      ```json
+      "rust-client.rustupPath": "~/.cargo/bin/rustup",
+      ```
+
+### Toolchain running problems
+* **If you see the error when running `cargo` on OS X:**
+  * `"Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib" cargo`
+* **Change your OpenSSL version:**
+      ```bash
+      brew switch openssl 1.0.2r
+      ```

notes/mechanics.md

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+# Mechanics
+
+## Error Handling
+
+* Rust has a built in generic enum called Result.
+* It allows us to return a value that has the possibility of failing.
+* It is the idiomatic way in which the language does error handling.
+
+```rust
+enum Result<T,Q>{
+    Ok(T),
+    Err(Q)
+}
+```
+
+### Example:
+
+```rust
+fn might_fail(i:i32) -> Result<f32,String> {
+    if i == 42 {
+        Ok(13.0)
+    } else {
+        Err(String::from("this is not the right number"))   
+    }
+}
+```
+
+#### Verbose Way:
+
+```rust
+fn main() {
+    let result = do_something_that_might_fail(12);
+    match result {
+        Ok(v) => println!("found {}", v),
+        Err(e) => println!("Error: {}",e),
+    }
+}
+```
+
+#### Concise Way:
+
+```rust
+fn main() -> Result<(), String> {
+    let v = do_something_that_might_fail(42)?;
+    println!("found {}", v);
+    Ok(())
+}
+```
+
+#### Bad Way:
+
+**Don't use `unwrap()`.**
+
+```rust
+fn main() -> Result<(), String> {
+    // concise but assumptive and gets ugly fast
+    let v = do_something_that_might_fail(42)?;
+    println!("found {}", v);
+
+    // this will panic!
+    let v = do_something_that_might_fail(1)?;
+    println!("found {}", v);
+
+    Ok(())
+}
+```
+
+---

notes/resources.md

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+# Resources
+
+## Getting Started
+
+* [Intorust Screencasts](http://intorust.com/)
+* [Tour of Rust](https://tourofrust.com/)
+* [Learning Rust](https://learning-rust.github.io/)
+* [A Half-Hour to Learn Rust](https://fasterthanli.me/blog/2020/a-half-hour-to-learn-rust/)
+* [Let's build a Guessing Game](https://doc.rust-lang.org/book/ch02-00-guessing-game-tutorial.html)
+* [Read Rust: Getting Started](https://readrust.net/getting-started)
+* [Rust 101](https://www.ralfj.de/projects/rust-101/main.html)
+* [Exercism Rust Track](https://exercism.io/tracks/rust)
+* [Web Dev with Rocket](https://christine.website/blog/how-i-start-rust-2020-03-15)
+
+## Getting Help
+
+* [The #beginners channel on Discord](https://discord.gg/rust-lang)
+* [Users forum](https://users.rust-lang.org/)
+* **IRC:**
+  * [#rust](http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust)
+  * [#rust-gamedev](http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-gamedev)
+  * [#rust-osdev](http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-osdev)
+  * [#rust-webdev](http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-webdev)
+
+## Resources
+
+* [Official Learning Resources](https://www.rust-lang.org/learn)
+* [Official Rust Book](https://doc.rust-lang.org/book)
+* [Read Rust](https://readrust.net/)
+* [Learning Resources](https://github.com/ctjhoa/rust-learning) ★
+* [Awesome Rust](https://github.com/rust-unofficial/awesome-rust)
+* [Rust Style Guidelines](https://doc.rust-lang.org/1.0.0/style/README.html)
+* [Rust by Example](https://doc.rust-lang.org/stable/rust-by-example/)
+* [Code Explainer](https://jrvidal.github.io/explaine.rs/)
+
+## Bloggers
+
+* [This Week in Rust](https://this-week-in-rust.org/)
+* [Niko Matsakis::Baby Steps](http://smallcultfollowing.com/babysteps/)
+* [Mara's Blog](https://blog.m-ou.se/)
+* [llogiq](https://llogiq.github.io/)
+* [Christine Dodrill](https://christine.website/blog)
+* [Barely Functional](https://blog.mgattozzi.dev/)
+* [In Pursuit of Lazziness](https://manishearth.github.io/)
+* [seanmonstar](https://seanmonstar.com/)
+* [Stjepan's blog](https://stjepang.github.io/)
+
+## Articles
+
+* [References in Rust](https://blog.thoughtram.io/references-in-rust/)
+* [Why Rust?](https://christine.website/blog/why-rust-2020-02-15)
+* [Rust's runtime](https://blog.mgattozzi.dev/rusts-runtime/)
+* [What's a lang item?](https://manishearth.github.io/blog/2017/01/11/rust-tidbits-what-is-a-lang-item/)
+* [Writing Python inside your Rust code](https://blog.m-ou.se/writing-python-inside-rust-1/)
+* [Rust Disassembly](https://giordi91.github.io/post/disassemlbyrust1/)
+* [Porting Godot Games to Rust](https://paytonrules.com/post/games-in-rust-with-godot-part-one/)
+* [Why Rust?](http://rust-class.org/0/pages/using-rust-for-an-undergraduate-os-course.html)

notes/rustbook.md

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+# Rust Book
+
+## What could be better?
+
+**Tell me the notable features of Rust earlier!**
+
+* Spends too much time telling about the basics (_chapter 1-6_). However, I believe the real audience of Rust is not novices, but veterens.
+
+* Also, the book spends a lot of time explaining the module, crate, package structure (_chapter 7_) way before they are really needed. I don't care about the facade (re-exporting).
+
+* I remember wondering about what are traits from the beginning.
+
+## The most useful chapter was these ones:
+* Programming a Guessing Game
+* Understanding Ownership
+
+## What should have included from the start?
+* A tour of stdlib: io, env, net, idk?!
+* Rust editions could be clarified. IDK what are they.
+
+---
+
+## Chapter 1: Getting Started
+
+* `rustup` installation OK.
+* Don't talk about `rustc`, just tell me `cargo [new|run]`.
+* Unnecessarily talking about `Cargo.toml`. Tell me you're going to explain me later. And you do in the Guessing game chapter.
+
+## Chapter 2: Programming a Guessing Game
+
+* Awesome chapter, nothing to say.
+
+## Chapter 3: Common Programming Concepts
+
+* The worst chapter ever.
+* Explains the basic concepts very DRY. As if it's a spec of the language...
+
+## Chapter 4: Understanding Ownership
+
+* Awesome chapter.
+* Talks about stack/heap difference way earlier. Not needed at this stage. Talk about it when talking about copying integers (_where there is no need clone them_) etc.
+* Why explain slices here? Explain where it is needed, later on.
+
+## Chapter 5: Structs
+
+* Another boring chapter. Dry like the 2nd one.
+* Methods and the Rectangle example at the end were enough.
+
+## Chapter 6: Enums and Pattern Matching
+
+* Dry... Boring... Although there are interesting features like `match`, data binding to `enum`s, etc. These aspects should have been highlighted more.
+
+## Chapter 7: Managing Growing Projects with Packages, ...
+
+* WTF?! Why is this here? I didn't create a big project yet. Why should I want to manage my "growing" project? Not yet. Explain me later on.
+
+* Why do you talk about the glob operator if it's often used when testing!
+
+## Chapter 8: Common Collections
+
+* "deref coercion": Too much unnecessary complexity at this point (which is a topic of Chapter 15!). So, just show me what can be done and not without explaining the inner details yet. I can look them up if I need to.
+

notes/shocks.md

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+# Shocks
+
+Weird Rust stuff documented.
+
+1. **There is no null in Rust!**
+
+   Instead, there is `None`, and there is:
+
+   ```rust
+   enum Option<T>{
+      Some(T),
+      None
+   }```
+
+2. **String `AsRef<Path>`**
+
+   Why the heck `String` has a responsibility for `Path`...
+
+3. **Why Rust doesn't allow marking only some struct fields mutable?**
+
+   Each field is in a different memory location. However, the struct
+   is a type. So, when using it, we can't know which part of the
+   struct's instance that the other code is going to use.
+
+4. **I couldn't grasp how to run multiple files together from get-go**
+
+    src/main.rs:
+
+       mod vectors;
+       fn main() {
+           vectors::run_vectors();
+       }
+
+    src/vectors.rs:
+
+       pub fn run_vectors() {
+           println!("vectors!");
+       }
+
+    Best explanation:
+    https://learning-rust.github.io/docs/d3.modules.html
+
+5. **String concatenation uses the buffer of the origin string**
+
+   This is a good thing as in the op below, Rust will copy str2 to
+   str1's buffer.
+
+   str1 + &str2;

notes/tips.md

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+# Tips
+
+
+## General
+
+1. Create SMALL rust binaries, see: [min-sized-rust](https://github.com/johnthagen/min-sized-rust).
+2. Compile simple programs w/`rustc`, but larger programs w/`cargo`.
+3. Format your code automatically: `rustfmt`.
+
+
+## Cargo
+
+1. Creates a new crate (it's like `go mod init`):
+   `cargo new <name>`
+
+   Without a git repository:
+   `cargo new <name> --vcs none`
+
+2. Build the crate (it's like `go create`):
+   `cargo build`
+   `cargo b`
+
+3. Run the crate (it's like `go run`):
+   `cargo run`
+   `cargo r`
+
+   1. Silently run:
+   `cargo r -q`
+
+4. Check whether your program can compile:
+   `cargo check`
+   `cargo c`
+
+   Rustaceans use this command to periodically check their programs. After working on their program, and when they're sure, they build your program using `cargo build --release`.
+
+   This command produces a faster program, but it'll take a longer time to compile.
+
+   This is also the command you want to use when you benchmark your code.
+
+5. Cargo caches. If you want to start on a clean slate, run:
+   `cargo clean`
+
+   Why? Sometimes, `cargo check` returns a warning. However, when you run it the second time, it doesn't display the warning. In that case, you can run `cargo clean`, and then run `cargo check` again. This way, you'll be able to see the error message again.
+
+6. You can see the documentation of every crate that your program/package depends on.
+   `cargo doc --open`
+
+7. Create a library package.
+   `cargo new --lib <name>`
+   _This command will create a package with a test._
+
+8. Work on someone else's project:
+   ```bash
+   git clone url/project
+   cd project
+   cargo build
+   ```
+
+## Memory Leaks
+
+1. Use [Valgrind](https://www.valgrind.org/info/) to check for memory errors.

notes/useless.md

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+# Useless Knowledge
+
+## Rust's name?
+
+Graydon is Rust's creator.
+
+    <graydon> I think I named it after fungi. rusts are amazing creatures.
+    <graydon> Five-lifecycle-phase heteroecious parasites. I mean, that’s just _crazy_.
+    <graydon> talk about over-engineered for survival

rpl/README.md

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+# Rust Programming Language Book
+
+I'm learning Rust, and here are my notes. In each program, you'll find extensive explanations about everything.
+
+## Index
+
+1. [Install Rust](../notes/install.md)
+2. [First Program](rpl/hello)
+3. [First Cargo Program](rpl/hello_cargo)
+4. [Guessing Game](rpl/guessing_game)
+
+## Other Stuff
+
+* [Weird Things about Rust](../notes/shocks.md)
+* [Useless Knowledge](../notes/useless.md)
+* [Some Rust Tips](../notes/tips.md)
+* [Some Rust Mechanics Explained](../notes/mechanics.md)
+* [Rust Glossary](../notes/glossary.md)
+* [Rust Comparison to Some Other Langs](../notes/langs.png)
+* [Awesome Rust Resources](../notes/resources.md)